Card punching machine



Aug. 6, 1940; M, MAUL 2,210,552

CARD PUNCHING MACHINE Filed April 27, 1939 I i a Sheets-Sheet 1 --=amql9 liwsmon ATTORNEYS Aug; 6, 1940. M. MAUL CARD runcame-mcamn Filed April 27. 1939 s Sheets-Sheet 2 FIG. 11.-

/24 INVENTOR a ATTORNEYS Aug; 6, 1940. M AU L 1 2,210,552

CARD PUNCHING MACHINE FiledApril 27, 1939 s sheets-sheet 4 INVENTOR WW BY ATTORNEYS Aug. 6, 1940. L 2,210,552

- CARD PUNCHING MACHINE I Filed April 27, 1939 8 Sheets-Shea.

FIG. 6.

iNVENTOR ATTOR N EYS Aug. 6, 1940. M. MAUL CARD. PUNCHING MACHINE Filed Apr-i127, 1939 B Sheets-Shet 6 mm wm mm MN QN I INVENTOR ATTORNE S Aug. 6, 1940. MAUL CARD PUNCHING MACHINE 8 Sheets-Sheet 7 Filed April 27. 1939 FIG. 12.

INVENTOR BW ATTORNEYS Aug. 6, 1940. M. MAUL 2.210.552

CARD runoume MACHINE Filed April 27, 1939 s Sheets-Sheet a 1 0 H2 Y WS3X ED FC RF 5VT G 6 BZ H 7N U38 M I K9 0 L0 P swarm.

INVENTOR ATTORNEYS Patented Aug. 6,

- UNITED STATES PATENT OFFICE CARD runcnmc momma Michael Maul, Berlin-Johannlsthal, Germany, as-

sig'nor to the firm Deutsche Hollerith Maschinen Gesellschait 111. Germany h'. 11., Berlin-Lichterfelde,

Application April as, me, serial No. 210,324

' In Germany May 24, 1938 scams. 164-112) This invention relates to a machine for operating on record cards, particularly to a machine for punching data representations into record cards which are subsequently used to control accounting machines according to the data representations. 4 The invention is especially concerned with the punching of plural deck cards or cards with-verticaily spaced data designating decks, each equivalent to a single card unit.- Each deck of a card According to the disclosure or my previous Pat-- ent 1,962,60'L the punching of plural deck cards is eflected by a plurality of punch sets,.each set' adapted to punch a diflerent deck of the card,

25 with the further provision of a single set of char acter selecting keys adapted to be alternatively "correlated with anyof the punch sets to contro pimching of one card deck at a The present invention avoids the necessity of providing a pluralty of punch sets, one for-each card deck, and utilizes only ajsingle punch set for punching any one of thecard decks. The V punch set, in the present instancefcomprises a column of punches for punching one columnof a 35 "deck at a time, and the card is fed laterally stepby step past the punch column to enable the columns to be punched one at a time and in succes- 7 sion. In order to provide for the punching by the single column of punches of any of the carddecks,

an object of the present invention is to provide means for shitting the position of the punches vertically with respect-to the-card so as to corre- Ia'tethepunch column with aselected one of the invention contemplates'the provislonof a movable carriage for the setof punches; withthe carriage being'movable vertically or' in the same directionin whichacard column extends, so a to bring the pinches-into position for punching anyone ot'the vertically onset carddecks. .At-

with respect pins butalso the corresponding punch die, the punch interposers, the punch operating means, and a cover for the punch assembly. ,The parts carried by the punch carriage maybe referred to, collectively, as a punch unit. 5 To guide the punch operator, it is desirable to write or print, at one end oieach column of the card, the character to be pimched in coded form into the column. In previous machines, with a card column in punching position, the punchx g supporting framework covers' and conceals the entire column, preventing the operator from viewing the character atone end of the column and using the character as a guide to the punching oi the same column. One purpose of the present invention is to overcome this difilculty by providing a punch unit construction which exposes the character writtenat one end of the column while this same column is in punching position. Fur- -ther,the invention provides for the exposure of the written or printed characters of the columns of any selected one of a plurality of decks of a plural deck card during the punching ofthe selected deck. To'attain these'objects, the invention provides for the holding and guiding framework of the punches to be supported cantileverfashion, terminating shortot the row of characters. at the foot of the columns of the card deck which is in correlation withthe punch unit, and

thereby exposing the character of a column while I this same column is in punching position.

- In the preferred embodiment of the invention,

the punch carriage is slidably mounted on the machine frame to adjust the punches into position for punching either of the decks of a double deck card. To avoid encumbering the punch carriage with the power actuator which actuates the punches, it is preferred to support thls'power'actuator ona stationary part ot the machine frame. In order to adapt the actuator ior operating the punches when the-punchcarriage is in either of its different positions, the actuator is connected through a self-adjusting linkage to a punch depressing means which is supportedby the carriage tor movement with the punches and; dies. The punch depressing means includes a punch depressor device slidably carrying the front portions of the punch interposers, and upon depression of the device, the vin'terposcr elements positioned- I -abcve.the-.heads of selected punches will force the p1'mch'esthrough'therecord card. The power actuatprjis in the 101m of a magnet stationarily carried by the frame and the armature of which is a link to'the punch depressor Inor'dertoenablethelinktoshittwith as 2 v the punch depressor device into the diiferent vertically spaced; positions of adjustment or the punch carriagewhile retaining its actuating connection to the depressor device, and without disturbing the position of the actuating armature,

a Cardan joint or'universally rockable connection is provided between-the link and the depressor device. The connection between the armature of the actuating magnet and the punch depressing means is thereby of such a nature as to enable the punchesto be actuated with the same pressure in either position of adjustment of the punch car- It is also preferred to set the interposers for the punches mechanically through Bowden cables actuated by combs, selectively set under .co'n'trol of a character selecting keyboard, the combs being I particularly advantageous in the punching of ,combinational hole representations of the charclaims and irrespective of other specific statements as to the scope of the invention contained herein.

. In the drawings;

Fig. 1 is a perspective view of the machine; Fig. 2 is a sectional view indicating. the locking means for the handle which adjusts the punch carriage;

Fig. 3 is an example of a double deck record card which mayebepunched by the present ma,-.

chine;

Fig. 4 is a front, partially sectional view of the machine with the punch carriage and the card carriage removed;

Fig. 5 is a section along lines 5-5 of 4;

Fig. 6 is a front sectional view indicating the card carriage and parts of the escapement mechanism;

Fig. 7 is a plan view of. the card carriage and its escapement mechanism; I

Fig. 8 is a section along lines 6-8 of Fig. 4;-

Fig. 9 is a top' view of a punch carriage with its cover in section;

Fig. 10 is a section along lines Ill-l6 of Fig. 9 drawn on an enlarged scale;

Fig. 11 is a section along lines lI-H of Fig. 5; Fig. 12 is a plan view of the machine with the punch carriage and the card carriage removed;

Fig."l3 is a detail side view of operating. connections to the escapement mechanism of the card carriage; 1

,Fig. 14 is a section through the escapement pawl mechanism; and

Fig. 15 illustrates the combinational code and the arrangement of the key levers and the association of key levers and comb bars for selecting the punches to punch the code designations. The machine comprises a main frame and housing ll enclosing the internal mechanism including double card punch magnet l2 -(Figs. 4, 8, and 12) which is fastened to a yoke l3, secured by screw means It to the rear wall of the housing. Carried by yoke I3 is an angle l5 supporting a'stop'screw l6, engaging the yieldable spring packet H, on one arm of the armature lever is, so as toiimit and dampen retractive movement of the armature lever efie'cted'under the influence of aPspring l8. Lever i8 is rockably mounted on a shaft l9 and has an armature piece 26 opposite Y bridged by a stripper and the poles of magnet I2. When the magnet is energized, it attracts armature piece 26 to rock lever l8 clockwise (Fig. 8) until packet l1 encounters fixed stop screw 2| to limit and dampen clockwise movement of the. armature lever. 5 Shaft i9 is rotatably mounted in Journal brackets 22 carried by the mainframe, and its right hand end extends outside the frame to rigidly carry an external handle 23. Inside the housing, shaft 19 rigidly carries-a gear segment 24 10 meshed with the rack 25 at the bottom of the slide 26 which forms the base of the punch carriage. Slide 26 is of dovetail cross-section to slidably fit into the correspondingly shaped guide.

groove formed in the top, central frame bar M of main frame ll (Figs. 6 and 12). I

The forward portion of slide 26 carries the punch die or matrix plate 21 having thedie holes into which the punches move to perforate the record and through which the card waste falls.

Extending above the slide 26 and secured by screws 26 to the rearportion of the slide is a bracket 26. The forward portion of bracket 26 is channeled and above the die plate 21 is lower punch guide plate 28a (see Figs. 8 and 10). Spaced above and parallel to the stripper plate 28a is an. upper punch guide plate 29 secured to and bridging the top of bracket 28. The plates 26:; and 2! guide the column of "six punches 36 spaced sim- 30 ilarly to the six indexor perforation positions of a column of the upper deck of the record card .T (see Fig. 3) adapted to be punched with an alphabetic character representation (see Fig. 15).

The front four punches only are utilized for 3.5

punching numerical representations into columns of the lower card deck. Springs 3| (Fig. 10) normally maintain the punches in upper, idle positions. The bracket 28, as described above, is I supported cantilever-fashion by the base 26 of the g punch carriage and, together with guide plates 28a and 29, forms a carrier for the punches 36. which is free of support at the front end and terminates short of the front portion of plate 21.

Thus when a card is disposed beneath the lower 5 punch-guide plate 26a and rests 011' die plate 21, the lower ends of the columns of both decks of the card shown in Fig. 3 are uncovered, enabling the operator to viewthe character written in the column at punching position and to use this written character as a guide to the punch selection for the same column. I

,On bracket 28 is fastened the mounting piece 32 for journaling the rock shaft 33 to which is pinned the rock plate 34, Rock plate 36 iscon- '55 nected .through a universally rcckable, Cardan joint 35 to the upper end of a link 36 which is pivoted at the lower end by a pin 31 to the armature lever I8. Plate 34 is formed with guide slots 34' open at the top and closed by a depressor plate 38 secured to the top of plate 34 so as to form closed guideways for six punch interposer slides 39, each movable above one of the six punches. The forward end of each slideis formed with an interposer mg 39' which, in the position shown in Fig. 10, is remote from the head of the corresponding punch 36. To select a punch for op- -Bowden wires 40 connected atthe upper end to the slide, as indicated in Fig. 10. The Bowden -wires are operated under control of the keyboard (see Fig. 1) in a manner which will be explained further on. 1 i

A cover for the punch carriage is fastened to bracket,28. As described above, the punch carriage comprises base slide 26 carrying punch die plate 21, bracket 28 provided with punch guide plates 28a and 29, punches30, slotted rock plate 34, depressor plate 38, and punch interposer slides 39. The punch carriage may be manually shifted to either of two alternative positions. In the rear position shown in Fig. 1, the punches and dies are in position to punch the upper card deck,

and in the forward position, shown in Fig. 8, the

tively locked in either of its positions by coaction of a sector 4| (Figs. 2 and 12), secured to shaft l9, with a spring pressed lock lever 42. The forward position of the punch carriage is deter mined by engagement of the front end of slide with a stop screw 43 (Fig. 8) and its rear posif tion by engagement of the back of the slide wit a stop screw 44.

During the shifting of the punch carriage from one position to the other, the upper end of link of the punch operating means, due to the Cardan joint connection 35 to rock plate 34,'is able to move freely with the punch carriage withoutaffecting its operating relationship to the rock plate.

The card waste punched out of the card fall through the open portion of slide 25 below die plate 21 (see Figs. 8 and 10) and onto the inclined sheet from where it .drops into chute 45 which leads the waste to abox'41 insertable below the chute through an opening in the right side of housing II (also see Figs. 1, 5, and 12).

Punch selecting} means The punch selecting means includes interposer slides 39 of the punch carriage and the Bowden wires 40, already referred to. as connected at their upper ends to the interposer slides. The upper end of each Bowden cable sleeve is secured to aplug '45 fitted within-the guide slot 34' of the associated interposer slide and anchored by a projection 49 to the rock plate 34 (see Fig. 10).

As indicated ingFigs, 4 and 5, the lower ends of the Bowden cable sleeves are similarly anchored between a fixed angle plate 50 and a U-shaped holder 5| fastened tothe angle plate. The lower end of each of the six Bowden wires is attached 40 a shoe 59 (Fig. -4) pivotally connected to the free end of the horizontal arm? of a bell crank lever 53. The free end of thevertical arm of each of thesix levers 53 is rdundedand has a swivel flirwithin aslot 52' of one of the six com-' ,binatien punch selector "slide bars 52 (also .see

Fig. 15). I

Inside main frame and housing H is an .open subframe comprising side angle bars 54 and 55, front angle bar 55, and rear cross bar 51, the subframe being. secured by screws ll'to the main frame (see Figs. 4, ,5, and 8). The-character keys of the keyboard (see Fig 1) comprise. key

levers '59 extending into the housing II and attheir rear ends passing into the guide slots formed also channeled along the top, and, inside the channel, carries a cross shaft 60 engaging into notches at the rear ends of the key levers to serve as a common pivot for the key levers. termediate their ends, the key levers pass through slots of a comb bar5l (see Fig. 5), parallel to bar 51 and also a part of the subframe. The slots of bars 51 and 6! guide the key levers and constrain them to vertical movement within their own planes. Additional guide means for the key levers is provided by a front comb plate 52 (Figs. 1, 5, and 8). Compression springs 53 seated on screws 54 (Fig.. 8) urge the key levers upwardly into engagement with a stop bar which is of resilien't material to dampen the blow of the key levers when they are restored. Screws 54, seating springs 53, are threaded into an angle bar 68 which isparallel to bars 51 and iii and also a part'of the subframe. The strews are retained in adjusted positions by engagement with a spring bar 55 secured to the angle'bar 55. To prevent more than one key lever 59 at a time from being depressed, the usual ball lock is provided comprising balls 51 lying in the channel provided at the top of comb bar 61. Located between the comb bar 5| and the front of the housing Ilxand underneath the key levers 59, are the six combination punch selector bars 52, previously referred to. Bars 52 are slidably mounted for movement in a horizontal direction by slotted guide angles II and I2 and held down by engagement with'bars l3 and 14, the latter bar also engaging with the upstanding lugs 52m (Figs. 4 and 15) of the bars 52 to limit their movement to the right (Fig. 4) to their normal, rest positions. The coded arrangement of the key levers 59 with respect to the inclined comb .teeth 52b .of combination selector bars 52 is indicated mm. 15. Thedepression of a numeral or letter key will cause engagement of its key the head of the associated punch 30. The punch Y magnet I2 is then energized to cause operation of thepunches. The energization of the punch magnet occurs after the punch selection and as a result of actuation of one or more of the selector slides 52 by a humeral or letter key, in a manner which will now be explained. i

A vertically disposed bar 15 at the left of the selector slides 52 (as viewed in Fig. 4) .is fastened to the machine frame (see also Fig. 11). Extending horizontally from plate 15 is a stud 15 for pivotaliy mounting an inverted U -shaped yoke 11, the legs of which are joined by a pin 18. The pin 18 extends across the left ends of all the selector slides 52 so that upon actuation I of any slide 52 to the-left by operation of a key lever 59, the left edge of the slide acts on pin II to rock the yoke 11 clockwise (Fig. 4). A spring 80, extending between an anchoring piece II and the yoke 11, resists the clockwise movement of theyoke, which is eifected by actuation of bars 52 upon depression of a key lever 54, and serves, when the operator lets go of the key, to restore the yoke and the slides.

Therestored counterclockwise position of yoke u in rear cross bar 51 (see Fig. 5). The bar 51 is .11 is normally determined by engagement of lugs.

82a of the selector slides 82 with the right hand end guide .bar I8 (Fig. 4). However, should the slides be removed, the spring 88 could move the yoke 11 further counterclockwise only a slight 5 amount before the yoke would be arrested by engagement of the horizontally bent end of a rearward extension 82 of the yoke with a stop screw83. Also, when the slides 82 are removed, the bell crank levers 83 may move only between limits defined by the ends of a slot in a plate I8 (see Fig. 4) through which the horizontal arms of the bell crank levers pass. By the provision of these auxiliary stops for yoke 11 and bell crank levers 83, the slides 82 maybe reinserted without 18 difliculty into proper correlation with the yoke and the bell crank levers. T Rearward extension 82' of yoke 11 carries a pivot stud 82. for an L-shaped lever 8|, the upper end of which extends through a notched portion (see Fig. 5) of the blade 88 underlying the lower spring leaf 8! (see also Fig. 11) of the normally open switch 85, the closure of which is adapted to complete a circuit for energizingthe punch magnet I2. The upper end of lever 8i is formed with an angular notch 8|, the side of which normally abuts the side of, the notched portion of blade 88 while the bottom is directly under the blade 88. Upon depression of a key lever, at least one'selector slide 52 is actuated to the left and its left-edgeacts on pin I8 to rockyoke 'l'l: clockwise. As a result, lever 8! is raised bodily, causing the bottom of .angular notch 8i to engage and lift the blade 88, thereby closing switch 88., The closure of switch 88 is timed to occur after the actuation of slide or slides 82 has resulted in the setting of the interposer lugs 88' in punch operating position. Upon closure of switch 88, punch magnet I2 is energized, rocking the armature lever, I8 clockwise (Fig. 8 to pull down on link 88, which in turn, rocks the depressor assembly 88, 38 downwardly (Fig. 10). The operatively positioned interposer lugs- 88' thereupon act on the heads of the punches 88 underneath to force thesepunches through the card, thereby perforating the column in punch ing position.wit hv the coded representation of the character marked on the depressed key lever 88.

Thepunching operation having been com- 1 pleted, it is now necessary to deenergize punch magnet I2 by opening switch 88. For this purpose, the following means are provided: I

Attached to armature 28 is a plate 81 (Figs.

4, 8, and 11) connected tothe .upper end of a 1 link 88 which at the lower'end, is connected to a lever 88, pivoted on a flxed angle bar 8|. Ini-v tially, the nose 88 of lever 88 is at a distance above thetail of the switch-operating lever 8i. Wheh the' .punch magnet I2 is energized to cause operation of the punches, armature 28 is ,attracted and, through plate 81', elevates, link 88 to rock the lever 88 counterclockwise (Fig. 11),, as a result of which the nose 88 of the'lever moves I down and contacts'the tail of lever M to rock a the latter clockwis e(Fig. 4);, As lever 8i rocks' clockwise, the angular notch 8| inthe upper and thereof. withdraws its support from blade, 88, permitting the lower spring contact leaf 88' of .78, been restored and while lever 8| remains in.

card to its final position Y the left of sleeve 88 is an switch "to spring downwardly and the switch to open. As blade 88 is also lowered by the raised position. The initial distance of nose to of lever 88 above the tail of switch-operating lever u is such as to cause the opening of switch .88 to be deferred till after punches 88 have been driven through the card to punch the. selected character representation. As switch 88- opens, punch magnet I2 is deenergized with resulting restoration of the punches, of the punch-operating apparatus, and of the remaining parts connected to'the armature 28 and including lever 88.

when the operator lets go of the active key lever 88, spring 88 (Fig. 4) becomes effective to restore yoke 11 and, through thepin I8 of the yoke, to restore the actuated selector slides 82. As yoke 11 returns to normal, lever 8| is lowered, and when the bottom of notch 8I' thereof reaches below the blade 88, the spring 84 becomes eflective to rock this lever counterclockwise, locating the bottom of the notch underneath the blade in readiness to close the switch 88 again when the operator next operates a key lever 88.

The card carriage and feeding means for moving the card laterally to dispose the card columns or sections successivelyin punching position between the punches 88 and die plate 21.

This lateral feed of the card is normally effected by step by step feeding means controlled by the punchoperating means as an incident to but following each punching operation. As is usual in punching means for record cards, means are also provided to eifect a feedstep under control of a space key of the keyboard without an accompanying punching'operation. In addition.

a release key of the keyboard is provided, operation of which causes a continuous feed of the without accompanying punching operation.

Before describing the card feeding means, the space and release key mec-will be explained, with particular reference to FigsJl, 5, and 12. The space key is in the form of a bar 88 bridging -a pair of arms 82 which, at their rear ends, are fixed to a sleeve 88 rotatably sur-' rounding a shaft 88 journaled by pointed screws 81 carried by the side bars 88 and 88 of the subframe. The release key 88 is a similar bar bridging arms 88 fixed-to a sleeve 88 pinned .to

the shaft 88. Aspring= III, (Fig. 5) connected "to one of the arms 82 of the space key mechanism holds the space key in ilpper, idle At d arm I88 also rotatably carried by shaft It and held by a spring in against a pin I 88 exteriding from-the left arm 82. Thus,.arm I88 is cdnstrained tomove rearwardlyor counterclockwise (as viewed in Fig. 8)

bypin I88 when thespa'ce key mechanism is restored by sprinr Immune-mumm urged by spring I88, to move forwardly. or clockwise, together with arms 82, when the operator depresses the space key. y Duririg'its forward movement,

the upper, blunt end ,0! arm I88 images and operates a lever I88'o'f the esca 'ment mechanism (see'Figs'. 6, 7, 13, and 14)}"fo'r eifecting a singlestep of feed of the card, as'willbe further explained later. The release key mechanism is held in restored position by a spring I82 (Figs. 5

and. between angle bar88 and one'arm of a bell crank lever I88, pinned similarly torelease key sleeve 88 to the shaft 88. Extending "from the other arm of the lever I88 is apin I III againstwhich the short side of a U-shaped yoke or lever I81 is-yieldably held by a spring 88 (Figs. 5 and 8). Yoke I01 is rotatably carried by shaft 00 and located between arm I00 and lever I00. The lever I01 is constrained by pin I I0 to move rearwardly upon restoration of the release key mechanism by spring I02, and is yieldably urged forwardly by spring I00 to follow the pin in the opposite direction when the release key is depressed. The long side of yokeor lever I01 extends vertically and upon its forward'movement, the upper end thereof strikes the escapement release lever I00 (see Figs. 6, '7, 13, and 14) to,-

cause release of the escapement mechanism of the card'feeding means, as will be further described later. v

.The card feeding mechanism. proper will now be described,,with reference particularly to Figs. 6, 7, l3, and 14. The card carriage comprises a bar IIO (also see Figs. 8 and 11) movable below the card bed or support Ila which is part of the'top of the frame and housing II. Near its opposite ends, the bar II 0 rigidly carries axles IIO, the ends of which rotatabiy mount the rollers II! which ride between upper and lower tracks I20 and I2! connected by bolts I20 (see Fig. 11). To the top of and at one end of bar III is secured a bracket IIO carrying the adjustable abutment IIO for the right edge of the card'(see also Fig. 1). To the top of the other 0 end of bar 0 is secured the handle I20 which is moved by the operator to the right to return the card carriage to the starting position. Handle I20 pivotally carries the spring-pressed clip I 2| for the left edge portion of the card. The abutment H0 and clip I2I hold a card between them to move the card together with bar III of the card carriage, the frame ledge Ila serving as a supporting bed on which the card lies during its movement with the carriage. The limits of travel of the card carriage are determined u; by screws I01- (only one is shown) which engage the ends of the bar IIO.

Below bar H0 and secured thereto by bolts I22 are rack I20 and escapement bar I24. Rack I23 is toothed. on opposite sides, and meshed with the teeth of one side of rack I20 is the drive pinion I00 connected to a spring motor I02,

the two latter parts being mounted on a fixed frame plate I04. The teethon the opposite side of rack I20 are geared to a governor comprising parts I00, I00, I01, I30, and I00, all mounted on a frame plate I40.- Return of the card carriage by handle I20 to starting position energizes the 6 Dog I is'pivotally mounted on apin I44 carried by the frame plate I 40 secured to the machine frame II. The dog I has a pin and slot connection I; with the hereinbefore mentioned lever I04, whereby the operation of the lever cone trols the operation of the dog, the restored positions of both being determined by engagement of the tail of the'dog with a stop screw I40.-

Lever I04 is pivoted on a pin I41 carried by a member' I40 which isrockabiy mounted on a pivot stud-I40 fastened to frame plate I40 (see Figs, ,0, "l, and 14). Member I40 is heldbya -spring.leaf I40 against an adjustable stop screw I00, adjustment of which. determines the posi- 'tion ofpivot pin I41. Pin I 41 rotatablymounts not only lever- I04 but also escapement release lever I00 and the escapement pawl I42. The paw'l is formed with a slot I42"into which a pin III of the lever I04 projects for rocking the pawl upwardly upon counterclockwise movement of the lever. Normally, the pawl I42 engageswith a tooth or the escapement bar I24 to prevent forward travel of the card carriage. Upon energization of the punch magnet I2, the armature 20 acts through a spring I02 (Fig. 13) to rock a lever I00 which is engaged with one arm of the lever I04 (see Fig. 7) so as to rock the latter counterclockwise against resistance of spring I 00. Through the pin and slot connection Hi, this movement of lever I04 forces the nose of dog I4I into engagement with a tooth of the escapement bar I24. Pin IOI has vertical playvin the slot of pawl I42 and, before this play is taken up, the dog I engages the escapement bar to prevent forward travel of the card carriage. Continued counterclockwise action of the lever- I04 lifts the pawl I42 out of engagement with the escapement rack which is now being restrained by dog I. As pawl I42 releases the bari24, a spring I00 movesthe pawl-bodily to the right (Fig. 7) this being permitted by the loose mounting of the pawl on the pivot stud I41, so as'to dispose the nose of the pawl above the next tooth of the escapement bar. The parts remain in this position until after the punches 00 have been H magnet I2. Consequently, as armature 20 is restored, the spring I02 relaxes and lever I00 (Figs.

'l and 13) returns to normal position, releasing lever I04 for clockwise restoration by its spring I00.- As lever I04 rocks clockwise, spring I00 returns the pawl I42 into engagement with the next. tooth of the escapement rack I24. Clockwise action of lever I04 also acts through pin and slot connection MP to release dog I from the rack I24, permitting the spring motor I02 to advance the card carriage one step before being stopped by the pawl I42, and thereby locating the next column between the punches and dies.

The support I40 of pivot stud [41 is so adjustedand the escapement parts so proportioned as to cause the entire escapement step of the card carriage to take place during the restoration of the armature 20.

The escapement step described above may be effected, without an accompanying punching operation, by the operation of the space key 03. As shown in Fig. 13, the free end of arm I 00 of the space key mechanism engages the escapement lever I04. When the space key is depressed, the arm I00 rocks forwardly to actuate the lever I04 in a counterclockwise direction (Fig. 7), causing dog I to engage the escapement rack I24 and the pawl I42 to release the rack. Upon release by the operator of the space key, the lever I 04 returns to normal, causing an escapement step tooccurin the same manner as described before.

The escapement mechanism is released, when the operator depresses release key 00, for permittinga continuous movement of the card carriage to the end of its forward stroke. Leve I 01 of the release key mechanism rocks forwardly as a result of the depression of 1 the release key and moves the lever' I00, engaged therewith, counterclockwise (Fig. '1). The lever I00 is formed at its right end with a'bent lug I00 which, upon counterclockwise movement ofthe lever, engages the overhanging portion of escapement pawl I 42 to 

